DymarskiiY. M. (2001). On the Manifolds of Eigenvectors of Linear and Quasilinear Finite-Dimensional Self-Adjoint Operators. II. Ukrains’kyi Matematychnyi Zhurnal, 53(3), 296-301. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/4252